I really, really like the Mountain Equipment Ibex pants (IBEX). They turn a drizzle, dry quickly, fit me well, ankles are sewn for shock cord insertion. I wear them for fat biking and commuting between about 10 degrees and into the mid 30s. I'm warm blooded, so those temps might increase for others. Between mid 30s and low 50s (when I switch to shorts), I wear Haglofs Mid Fjell pants (Haglofs). The Haglofs are lighter, hence more packable, but very comfortable with a gusseted crotch for riding. I will be taking the Haglofs on my Twin Cities to St Louis to Santa Fe to Yellowstone to Twin Cities tour this summer.